Uninitialized Constant Error from Ruby EventMachine Chat Server - ruby

Question

I'm trying to build a chat server in ruby using EventManager. Needless to day, I'm new to Ruby and feeling a little over my head with the current error I am getting, as I have no clue what it means and a search doesn't return anything valuable. Here's some of the logistics-
(ive only implemented LOGIN and REGISTER so I'll only include those..)
user can enter-
REGISTER username password - registers user
LOGIN username password - logins user
I'm taking in the string of data the user sends, splitting it into an array called msg, and then acting on the data based on msg[0] (as its the command, like REGISTER, LOGIN, etc)
Here is my code, all contained in a single file- chatserver.rb (explanation follows):
require 'rubygems'
require 'eventmachine'
class Server
attr_accessor :clients, :channels, :userCreds, :userChannels
def initialize
#clients = [] #list of clients connected e.g. [192.168.1.2, 192.168.1.3]
#users = {} #list of users 'logged in' e.g. [tom, sam, jerry]
#channels = [] #list of channels e.g. [a, b, c]
#userCreds = {} #user credentials hash e.g. { tom: password1, sam: password2, etc }
#userChanels = {} #users and their channels e.g. { tom: a, sam: a, jerry: b }
end
def start
#signature = EventMachine.start_server("127.0.0.1", 3200, Client) do |con|
con.server = self
end
end
def stop
EventMachine.stop_server(#signature)
unless wait_for_connections_and_stop
EventMachine.add_periodic.timer(1) { wait_for_connections_and_stop }
end
end
# Does the username already exist?
def has_username?(name)
#userCreds.has_key?(name)
end
# Is the user already logged in?
def logged_in?(name)
if #users[name] == 1
true
else
false
end
end
# Did the user enter the correct pwd?
def correct_pass?(pass)
if #userCreds[name] == pass
true
else
false
end
end
private
def wait_for_connections_and_stop
if #clients.empty?
EventMachine.stop
true
else
puts "Waiting for #{#clients.size} client(s) to stop"
false
end
end
end
class Connection < EventMachine::Connection
attr_accessor :server, :name, :msg
def initialize
#name = nil
#msg = []
end
# First thing the user sees when they connect to the server.
def post_init
send_data("Welcome to the lobby.\nRegister or Login with REGISTER/LOGIN username password\nOr try HELP if you get stuck!")
end
# Start parsing incoming data
def receive_data(data)
data.strip!
msg = data.split("") #split data by spaces and throw it in array msg[]
if data.empty? #the user entered nothing?
send_data("You didn't type anything! Try HELP.")
return
elsif msg[0] == "REGISTER"
handle_register(msg) #send msg to handle_register method
else
hanlde_login(msg) #send msg to handle_login method
end
end
def unbind
#server.clients.each { |client| client.send_data("#{#name} has just left") }
puts("#{#name} has just left")
#server.clients.delete(self)
end
private
def handle_register(msg)
if #server.has_username? msg[1] #user trying to register with a name that already exists?
send_data("That username is already taken! Choose another or login.")
return
else
#name = msg[1] #set name to username
#userCreds[name] = msg[2] #add username and password to user credentials hash
send_data("OK") #send user OK message
end
end
end
EventMachine::run do
s = Server.new
s.start #start server
puts "Server listening"
end
Whew, okay, it's only the beginning, so not that complicated. Since I'm new to Ruby I have a feeling I'm just not declaring variable or using scope correctly. Here's the error output:
chatserver.rb:16:in start': uninitialized constant Server::Client
(NameError) from chatserver.rb:110:inblock in ' from
/Users/meth/.rvm/gems/ruby-1.9.3-p392#rails3tutorial2ndEd/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in
call' from
/Users/meth/.rvm/gems/ruby-1.9.3-p392#rails3tutorial2ndEd/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in
run_machine' from
/Users/meth/.rvm/gems/ruby-1.9.3-p392#rails3tutorial2ndEd/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in
run' from chatserver.rb:108:in<\main>'
ignore the slash in main in that last line.
line 108 is the last function- EventMachine::run do etc.
Any help would be appreciated, if I didn't provide enough info just let me know.

Answer 1

I would think that when you call EventMachine::start_server you need to give it your Connection class as the handler. Client is not defined anywhere.